<template>
  <div class="register">
    <el-form ref="registerRef" :model="registerForm" :rules="registerRules" class="register-form">
      <h3 class="title">{{ title }}</h3>
      <el-form-item prop="username">
        <el-input
          v-model="registerForm.username"
          type="text"
          size="large"
          auto-complete="off"
          placeholder="账号"
        >
          <template #prefix><svg-icon icon-class="user" class="el-input__icon input-icon" /></template>
        </el-input>
      </el-form-item>
      <el-form-item prop="password">
        <el-input
          v-model="registerForm.password"
          type="password"
          size="large"
          auto-complete="off"
          placeholder="密码"
          @keyup.enter="handleRegister"
        >
          <template #prefix><svg-icon icon-class="password" class="el-input__icon input-icon" /></template>
        </el-input>
      </el-form-item>
      <el-form-item prop="confirmPassword">
        <el-input
          v-model="registerForm.confirmPassword"
          type="password"
          size="large"
          auto-complete="off"
          placeholder="确认密码"
          @keyup.enter="handleRegister"
        >
          <template #prefix><svg-icon icon-class="password" class="el-input__icon input-icon" /></template>
        </el-input>
      </el-form-item>
      <el-form-item prop="code" v-if="captchaEnabled">
        <el-input
          size="large"
          v-model="registerForm.code"
          auto-complete="off"
          placeholder="验证码"
          style="width: 63%"
          @keyup.enter="handleRegister"
        >
          <template #prefix><svg-icon icon-class="validCode" class="el-input__icon input-icon" /></template>
        </el-input>
        <div class="register-code">
          <img :src="codeUrl" @click="getCode" class="register-code-img" />
        </div>
      </el-form-item>
      <el-form-item style="width:100%;">
        <el-button
          :loading="loading"
          size="large"
          type="primary"
          style="width:100%;"
          @click.prevent="handleRegister"
        >
          <span v-if="!loading">注 册</span>
          <span v-else>注 册 中...</span>
        </el-button>
        <div style="float: right;">
          <router-link class="link-type" :to="'/login'">使用已有账户登录</router-link>
        </div>
      </el-form-item>
    </el-form>
    <!-- 底部 -->
    <div class="el-register-footer">
      <span>Copyright © 2018-2025 ruoyi.vip All Rights Reserved.</span>
    </div>
  </div>
</template>

<script setup>
// 1. 新增 ElMessage 用于错误提示
import { ElMessageBox, ElMessage } from "element-plus"
import { getCodeImg, register } from "@/api/login"
import { ref, getCurrentInstance } from "vue" // 确保导入 ref
import { useRouter } from "vue-router"

const title = import.meta.env.VITE_APP_TITLE
const router = useRouter()

// 2. 替换 proxy：用 ref 直接绑定表单实例（解决 proxy 兼容问题）
const registerRef = ref(null)

const registerForm = ref({
  username: "",
  password: "",
  confirmPassword: "",
  code: "",
  uuid: ""
})

const equalToPassword = (rule, value, callback) => {
  if (registerForm.value.password !== value) {
    callback(new Error("两次输入的密码不一致"))
  } else {
    callback()
  }
}

const registerRules = {
  username: [
    { required: true, trigger: "blur", message: "请输入您的账号" },
    { min: 2, max: 20, message: "用户账号长度必须介于 2 和 20 之间", trigger: "blur" }
  ],
  password: [
    { required: true, trigger: "blur", message: "请输入您的密码" },
    { min: 5, max: 20, message: "用户密码长度必须介于 5 和 20 之间", trigger: "blur" },
    { pattern: /^[^<>"'|\\]+$/, message: "不能包含非法字符：< > \" ' \\\ |", trigger: "blur" }
  ],
  confirmPassword: [
    { required: true, trigger: "blur", message: "请再次输入您的密码" },
    { required: true, validator: equalToPassword, trigger: "blur" }
  ],
  code: [{ required: true, trigger: "change", message: "请输入验证码" }]
}

const codeUrl = ref("")
const loading = ref(false)
const captchaEnabled = ref(true)

// 3. 优化注册逻辑：完善响应处理 + 错误提示
function handleRegister() {
  // 改用 ref 实例调用校验方法
  registerRef.value.validate(valid => {
    if (valid) {
      loading.value = true
      register(registerForm.value)
        .then(res => {
          // 后端成功响应格式：{ code: 200, msg: "" }
          const username = registerForm.value.username
          ElMessageBox.alert(
            `<font color='red'>恭喜你，您的账号 ${username} 注册成功！</font>`,
            "系统提示",
            {
              dangerouslyUseHTMLString: true,
              type: "success",
            }
          ).then(() => {
            router.push("/login") // 注册成功跳转登录页
          }).catch(() => {})
        })
        .catch(error => {
          // 4. 适配后端错误响应：提取错误信息（若依框架通常返回 error.response.data.msg）
          const errorMsg = error.response?.data?.msg || "注册失败，请稍后重试"
          ElMessage.error(errorMsg) // 弹窗展示错误（如“当前系统没有开启注册功能！”“用户名已存在”）

          loading.value = false
          // 修正：captchaEnabled 是 ref 对象，需加 .value
          if (captchaEnabled.value) {
            getCode() // 注册失败刷新验证码
          }
        })
    }
  })
}

function getCode() {
  getCodeImg()
    .then(res => {
      // 适配后端验证码开关（res.captchaEnabled 控制是否显示验证码）
      captchaEnabled.value = res.captchaEnabled === undefined ? true : res.captchaEnabled
      if (captchaEnabled.value) {
        codeUrl.value = "data:image/gif;base64," + res.img
        registerForm.value.uuid = res.uuid // 存储验证码 uuid，用于后端校验
      }
    })
    .catch(error => {
      ElMessage.error("验证码加载失败：" + (error.message || "网络异常"))
    })
}

// 页面初始化加载验证码
getCode()
</script>

<style lang='scss' scoped>
.register {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100%;
  background-image: url("../assets/images/login-background .jpg");
  background-size: cover;
}
.title {
  margin: 0px auto 30px auto;
  text-align: center;
  color: #707070;
}
.register-form {
  border-radius: 6px;
  background: #ffffff;
  width: 400px;
  padding: 25px 25px 5px 25px;
  .el-input {
    height: 40px;
    input {
      height: 40px;
    }
  }
  .input-icon {
    height: 39px;
    width: 14px;
    margin-left: 0px;
  }
}
.register-tip {
  font-size: 13px;
  text-align: center;
  color: #bfbfbf;
}
.register-code {
  width: 33%;
  height: 40px;
  float: right;
  img {
    cursor: pointer;
    vertical-align: middle;
  }
}
.el-register-footer {
  height: 40px;
  line-height: 40px;
  position: fixed;
  bottom: 0;
  width: 100%;
  text-align: center;
  color: #fff;
  font-family: Arial;
  font-size: 12px;
  letter-spacing: 1px;
}
.register-code-img {
  height: 40px;
  padding-left: 12px;
}
</style>